My dr. never mentioned anything about saline and I did not find out about it until I started tuning into this group and read the research. I started with 3%, just to test it out and it was well tolerated. I graduated to 7% around May of 2023 and have been using it ever since. I use it once a day. Thankfully, I have no problem with it. It sounds like you are getting your mucus out which is a good thing.